package com.atguigu.gulimall.order.service.impl;

import com.atguigu.gulimall.order.entity.OrderEntity;
import com.atguigu.gulimall.order.entity.OrderReturnReasonEntity;
import com.rabbitmq.client.Channel;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.core.MessageProperties;
import org.springframework.amqp.rabbit.annotation.RabbitHandler;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Service;

import java.io.IOException;
import java.util.Map;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;

import com.atguigu.gulimall.order.dao.OrderItemDao;
import com.atguigu.gulimall.order.entity.OrderItemEntity;
import com.atguigu.gulimall.order.service.OrderItemService;

@RabbitListener(queues = {"hello-java-queue"})
@Service("orderItemService")
public class OrderItemServiceImpl extends ServiceImpl<OrderItemDao, OrderItemEntity> implements OrderItemService {

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<OrderItemEntity> page = this.page(
                new Query<OrderItemEntity>().getPage(params),
                new QueryWrapper<OrderItemEntity>()
        );

        return new PageUtils(page);
    }

    /**
     * queues： 声明需要监听的所有队列
     * <p>
     * org.springframework.amqp.core.Message
     * <p>
     * 参数可以写一下类型
     * 1、Message message：  原生消息详细信息。头 + 体
     * 2、T<发送的消息的类型>   OrderReturnReasonEntity content；
     * 3、Channel channel： 当前传输数据的通道
     * <p>
     * Queue： 可以很多人都来监听。只要收到消息，队列删除消息，而且只能有一个收到消息
     * 场景：
     * 1）、订单服务启动多个：同一个消息，只能有一个客户端收到
     * 2)、只有一个消息完全处理完，方法运行结束，我们就可以接收下一个消息
     */


    //@RabbitListener(queues = {"hello-java-queue"})
    @RabbitHandler
    public void receiveMessage(Message message,
                               OrderReturnReasonEntity content,
                               Channel channel) throws InterruptedException {
        //{"id":1,"name":"哈哈","sort":null,"status":null,"createTime":1610829716090}
        System.out.println("接收消息..." + content);
        byte[] body = message.getBody();

        //消息头属性信息
        MessageProperties properties = message.getMessageProperties();
        //Thread.sleep(3000);
        System.out.println("消息处理完成=》" + content.getName());
        //channel 内按照顺序自增的
        long deliveryTag = message.getMessageProperties().getDeliveryTag();
        System.out.println("deliveryTag==>" + deliveryTag);

        //签收货物，非批量模式
        try {
            if (deliveryTag % 2 == 0) {
                // 收货
                channel.basicAck(deliveryTag, false);
                System.out.println("签收了货物..." + deliveryTag);
            } else {
                //退货 requeue=false 丢弃  requeue=true 发回服务器，服务器重新入队。
                //long deliveryTag, boolean multiple, boolean requeue
                //签收了货物...6
                channel.basicNack(deliveryTag,false,true);
                //long deliveryTag, boolean requeue
                //channel.basicReject();
                System.out.println("没有签收货物..." + deliveryTag);
            }

        } catch (IOException e) {
            //网络中断

        }


    }

    @RabbitHandler
    public void receiveMessage2(OrderEntity content) throws InterruptedException {
        //{"id":1,"name":"哈哈","sort":null,"status":null,"createTime":1610829716090}
        System.out.println("接收消息..." + content);
    }
}











